Experimental Asynchronous Measurement-Device-Independent Quantum Cryptographic Conferencing

• URL: http://arxiv.org/abs/2602.20927v1
• Date: Tue, 24 Feb 2026 14:07:21 GMT
• Title: Experimental Asynchronous Measurement-Device-Independent Quantum Cryptographic Conferencing
• Authors: Yifeng Du, Yang Hu, Yufeng Liu, Wenhan Yan, Jinghao Zhang, Shining Zhu, Xiao-Song Ma,
• Abstract summary: In this work, we implement the three-user AMDI QCC network without global phase tracking.<n>We achieve a key rate of about $4.470times10-9$ bits per pulse under a maximum overall loss of about 59.6 dB.
• Score: 17.221743022174547
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The quantum cryptographic conferencing (QCC) protocol, which distributes identical secure keys to user groups, is a crucial component of the quantum network. Previous experimental works have implemented the measurement-device-independent (MDI) QCC, of which the key rate in an $N$-user network scales down as $R\sim O(η^N)$, respectively. Building on the MDI QCC protocol, the asynchronous MDI (AMDI) QCC protocol theoretically integrates the mode pairing scheme into QCC, significantly boosting the key rate to $R\sim O(η)$, which is independent of the number of users, and thus demonstrating greater application potential. Experimentally, in this work, we implement the three-user AMDI QCC network without global phase tracking by adopting the fast Fourier transform-based frequency difference estimation and the phase drift compensation technique. Finally, we achieve a key rate of about $4.470\times10^{-9}$ bits per pulse under a maximum overall loss of about 59.6 dB. This work provides a scalable solution for the development of large-scale quantum communication networks in the future.

Related papers

• Experimental demonstration of scalable quantum cryptographic conferencing [11.75056981688102]
  Quantum cryptographic conferencing serves as an essential solution to establish secure keys to realize secure multi-user communications.<n>Existing QCC implementations have been limited by the low probability of multi-user coincidence detection.<n>We report the experimental realization of QCC eliminating the need for coincidence detection.<n>We successfully performed QCC experiments over total channel losses of 66.3 dB, corresponding to 331.5 km of commercial fiber (0.2 dB/km), achieving secure key rates of 5.4 bit/s.
  arXiv  Detail & Related papers  (2025-12-07T05:18:54Z)
• Scalable twin-field quantum key distribution network enabled by adaptable architecture [14.846406513309322]
  Quantum key distribution (QKD) is a key application in quantum communication, enabling secure key exchange between parties using quantum states.<n>We propose a scalable TF-QKD network with adaptable architecture, where users prepare quantum signals and send them to network nodes.<n>A proof-of-principle demonstration with three users successfully achieved secure key sharing over simulated link losses of up to $30$ dB, with an average rate of $19.57$ bit/s.
  arXiv  Detail & Related papers  (2025-04-21T14:39:59Z)
• A Superconducting Qubit-Resonator Quantum Processor with Effective All-to-All Connectivity [44.72199649564072]
  This architecture can be used as a test-bed for algorithms that benefit from high connectivity.<n>We show that the central resonator can be used as a computational element.<n>We achieve a genuinely multi-qubit entangled Greenberger-Horne-Zeilinger (GHZ) state over all six qubits with a readout-error mitigated fidelity of $0.86$.
  arXiv  Detail & Related papers  (2025-03-13T21:36:18Z)
• A measurement-device-independent quantum key distribution network using optical frequency comb [2.87085365395994]
  Quantum key distribution (QKD) promises secure key exchange between two remote parties.<n>We propose and experimentally demonstrate a fully connected multi-user QKD network based on a wavelength-multiplexed measurement-device-independent (MDI) QKD protocol.
  arXiv  Detail & Related papers  (2025-02-17T14:52:22Z)
• Secure Multi-Party Biometric Verification using QKD assisted Quantum Oblivious Transfer [34.46964288961048]
  We present a practical implementation of a secure multiparty computation application enabled by quantum oblivious transfer (QOT)<n>The QOT protocol uses polarization-encoded entangled states to share oblivious keys between two parties with quantum key distribution (QKD) providing authentication.<n>A practical use case is demonstrated for privacy-preserving fingerprint matching against no-fly lists from Interpol and the United Nations.
  arXiv  Detail & Related papers  (2025-01-09T15:51:30Z)
• RSFQ All-Digital Programmable Multi-Tone Generator For Quantum Applications [36.136619420474766]
  Rapid Single Flux Quantum (RSFQ) technology is at the forefront of replacing current standard CMOS-based control architectures. We present a novel RSFQ device that generates multi tone digital signals, based on complex pulse train sequences.
  arXiv  Detail & Related papers  (2024-11-13T15:03:28Z)
• Efficient source-independent quantum conference key agreement [25.617190829449893]
  Quantum conference key agreement (QCKA) enables the unconditional secure distribution of conference keys among multiple participants. We propose a source-independent QCKA scheme utilizing the post-matching method. We introduce an equivalent distributing virtual multi-photon entanglement protocol for providing the unconditional security proof.
  arXiv  Detail & Related papers  (2024-06-25T04:24:06Z)
• Composable Continuous-Variable Multi-User QKD with Discrete Modulation: Theory and Implementation [2.7163502859846873]
  We generalize a well-established discrete-modulated continuous-variable (CV) QKD protocol from the point-to-point to the point-to-multipoint setting.<n> Experimentally, we validate the protocol in a passive optical network with 10 km access links, achieving a composable secure key rate of $2.185 times 10-3$ bits per symbol.
  arXiv  Detail & Related papers  (2024-06-20T18:00:01Z)
• Experimental anonymous quantum conferencing [72.27323884094953]
  We experimentally implement the AQCKA task in a six-user quantum network using Greenberger-Horne-Zeilinger (GHZ)-state entanglement. We also demonstrate that the protocol retains an advantage in a four-user scenario with finite key effects taken into account.
  arXiv  Detail & Related papers  (2023-11-23T19:00:01Z)
• A cost-efficient quantum access network with qubit-based synchronization [10.503263803759602]
  We propose a cost-efficient quantum access network (QAN) that uses qubit-based synchronization. We successfully achieved average secure key rates of $53.84$ kbps and $71.90$ kbps for each user over a 50-km commercial fiber spool. Our work provides a feasible and cost-effective way to implement a multi-user QKD network, further promoting the widespread application of QKD.
  arXiv  Detail & Related papers  (2023-08-28T08:03:21Z)
• Multi-User Entanglement Distribution in Quantum Networks Using Multipath Routing [55.2480439325792]
  We propose three protocols that increase the entanglement rate of multi-user applications by leveraging multipath routing. The protocols are evaluated on quantum networks with NISQ constraints, including limited quantum memories and probabilistic entanglement generation.
  arXiv  Detail & Related papers  (2023-03-06T18:06:00Z)
• Single-emitter quantum key distribution over 175 km of fiber with optimised finite key rates [45.82374977939355]
  We perform fibre-based quantum key distribution with a quantum dot frequency-converted to telecom wavelength. We demonstrate positive key rates up to 175 km in the regime. This result represents major progress towards the feasibility of long-distance single-emitter QKD networks.
  arXiv  Detail & Related papers  (2022-09-07T18:03:36Z)
• Experimental quantum conference key agreement [55.41644538483948]
  Quantum networks will provide multi-node entanglement over long distances to enable secure communication on a global scale. Here we demonstrate quantum conference key agreement, a quantum communication protocol that exploits multi-partite entanglement. We distribute four-photon Greenberger-Horne-Zeilinger (GHZ) states generated by high-brightness, telecom photon-pair sources across up to 50 km of fibre.
  arXiv  Detail & Related papers  (2020-02-04T19:00:31Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.